Dkevs



(M'ode1.) 2 Sheets-Sheet 1.

W. H. MOANDREWS.

. DEVICE FOR CONVERTING MOTION. NO. 379,405. Patented Mar. 13, 1888.

u. PETERS. Pholo-Lithognpherv Washington. u a

(ModeL) 2 S'heets-Sheet 2.

. H. MQANDREWS.

DEVICE FOR CONVERTING MOTION. No. 379,405. Patented Mar. 13, 1888.

Int P9211601 N. PETERS. PhMn-Lifiwgnphur. Washington. D. C.

NlTE STAT S \VILLIAM H. BIOANDREVS, OF YOUNGSTOWVN, OHIO, ASSIGNOR OFONEHALF TO ALBERT M. GERSTLE, OF SAME PLACE.

DEVlCE FOR CONVERTING MOTION.

SPECIFICATION forming part of Letters Patent. No. 379.405, dated March13, 1888.

Application filed January 4, 1386. Serial No. 187,556. (ModeL) To allwhom it may concern:

Be it known that I, \VILLIAM H. MOAN- nnnws, a citizen of the UnitedStates, residing in Youngstown, in the county of Mahouing and State ofOhio, have invented certain new and useful Improvements in Devices forOonverting Motion, of which the following is a specification.

My invention relates to an improved means for converting a reciprocatinginto a rotary motion, and will be fully and clearly hereinafterdescribed and claimed, reference being had to the accompanying drawings,in which Figure 1 represents aside elevation of the de- I 5 vicecomplete. Fig. 2 is a side elevation of the device separate from therack, shaft, and supporting'frame, one of the outside gearedcovering-disks being left off, so as to show a side elevation of one ofthe grooved disks,

showing the groove and an outside side elevation of its lever-clutch.Fig. 8 is an end elevation of the supportingframe, with the shaftmounted in bearings thereon, showing a sec tion (on line a b, Fig. 2')through the racks, the

two geared coveringdisks and the two grooved disks, and the collars forkeeping the disks in place on the shaft, showing also an edge view ofportions of the two lever-clutches and a face view of the twolever-springs connected 3c to them. Fig. 4. is an inside side elevationof one of thelever-clutches, showing also an edge view ofthelever-springconnected thereto. Fig. 5 isarear edge view of one of theleverclutches. Fig. 6 represents a portion of the construction shown inFig. 2, showing one of the lever clutch keys in place within the groovein one of the grooved disks, the lever being separated from the key by asection through it. Fig. 7 is an end elevation, and Fig. 8 a frontelevation, of a sewingmachine, showing my invention connected thereto.Fig. 9 is a detached side elevation of one of the grooved disks. Fig. 10is an end elevation of the device complete. Fig. 11 is a central sectionthrough one of the geared coveringdisks. Fig. 12 represents a sectionthrough line 0 d, Fig. 9.

The object of my invent-ion is to remedy the objections incident to theuse of the crankmotion by substituting for it a device whereby the poweris communicated during the entire revolution at the periphery of thedisk to which it is applied by means of racks or the mechanicalequivalent of the racks, for giving the outside covering-disks ahalf-turn,or more or less, back and forth on the shaft, for pur- 5 poseswhich will be more clearly shown by reference to said drawings, inwhich-- 1 is a suitable frame for supporting the shaft 2. This shaft andframe may be made in any well-known way, the frame being provided 6Qwith the usual hearings, in which the shaft 2 is mounted.

3 represents the base of the frame. It may be made in any desired formsuitable for the purpose, and for some uses may be dispensed 6 with-forinstance, when adapted for operat' ing a se\ving-machineas will be moreclearly hereinafter shown.

The two inner disks, 4 and 5, are preferably made of east-iron, but anysuitable material 0 may be used, and are rigidly secured to the shaft 2by a key or other well-known means. Each is provided with an annulargroove, 6, (see Figs. 2, 3, 6, 9, and 12,) the two inner walls of whichare at right angles, or substan- 5 tially so, to the face of the disk.These grooved disks may be placed close together, back to back,substantially as shown in Fig. 3, or as far apart as may be desired, andthe same mechanical action obtained.

The two lever-clutches or curved arms 7 are preferably made of iron orsteel, and are each provided with a curved key, 8, adapted to lit nicelyor closely in the grooves 6, so that alone they could be moved easily inthe grooves back and forth. The keys 8 are either formed in one piecewith the lever-clutches 7, which is preferable, or rigidly secured tothem in any well-known way, and are located on the lever 7, so that thehollow portion 9 cannot touch the hub 10.

To the front of each of the levers 7 is a spring, 11, secured to a pointnear the key 8 by a screw, 12. This spring passes down close to andtouches the hub 10, and is secured to 5 the opposite end of the lever 7by passing into a slot, 18. At the lower end of each of thelever-clutches 7, on the side opposite to the keys 8 and annular groovesG, is an outwardlyprojecting pin, 14. (See Fig. 2, also Figs. 3 x00 and5.) These pins 14 project one through a hole in the outer geared case,15, and the other through a hole in the opposite outer geared case, 16.(See Fig. 3.) These outer geared cases, 15 and 16, are fitted to theshaft 2,so as to turn easily thereon, and are each provided withgear-teeth 17. (See Figs. 2, 3, 6, 10, and 11.) The collars 18 areplaced on the shaft 2 between the frames 1 and the hubs 19 of the cases15 and 16, for the purpose of keeping them in place when put together;but for some purposes they may be dispensed with, as the frame 1 may bemade to touch the hubs and thereby hold them in place.

The peripheries 20 (see Figs. 3 and 12) of the disks 4 and 5 projectoutward, forming a flange, 21, to fit into an annular recess, 22, (seeFig. 11,) in the inner edges of the geared coveringcases 15 and 16, andare fitted so that the cases 15 and 16 may turn easily thereon, theirobject being to form a seat or cup to receive the flanges 21 for thepurpose of keeping the edges of the disks exactly in place; but, as willbe readily seen, in some cases they may be dispensed with.

A. double rackframe is illustrated, consistingof the ends23, curved toone side, asshown, so as to bring the rack 24c in position for its teethto-engage with the teeth on the case 15, and the upper rack, 25, inposition on the opposite side to gear in with the teeth on the case 16.

For convenience I have shown the double rack-frame as provided with ahandle, 26, (see Fig. 1,) by which it may be operated by hand; but thishandle 26 may be the piston-rod of a steam-engine or any other source ofpower for moving it; or it may be the connectingrod 27 ofasewing-machine, (see Figs. 7 and 8;) or it may form a part of anydevice in which it is desired to converta reciprocating motion into arotary motion. This rack is usually made of iron or steel; but it may bemade of any other suitable material to adapt it to any use it may bedesigned for.

It will now be seen from the construction above described that amovement of the rack-.

frame and the racks 24 25 in the direction of the arrow 2) (shown inFig. 1) will cause the geared disk 15 to turn in the direction of thearrow w, (shown in Fig. 1,) and the geared disk 16 to turn in theopposite direction, and that a movement of the racks in the direction ofthe arrow 00 will reverse these movements.

Reference being now had to Fig. 2, it will be seen that if the disk 15be moved in the direc tion of the arrow Y it will cause the leverclutch7, by means of its pin-connection l4 therewith, to turn with it in thesame direc tion, and as the spring 11 bears against the hublO it keepsthe key 8 exactly in the line or path of the annular groove 6, so thatit is thus permitted to move freely and easily therein in thisdirection. hen the movement of the disk 15 is in the direction of thearrow 2, it. moves the lever-clutch 7 (also by means of the pin 14) inthe same direction; but as the lever 7 does not and cannot touch the hub10 it will rigidly lock the key 8 in the grooves 6, because a movementagainst the pin 14 in this direction will cause the upper side of thekey 8 nearest the screw 12, as shown in Fig. 2, to bind or press firmlyagainst the upper sideof the groove 6, while the under side near theopposite side-or end, Ishould say-of the key 8 presses with equal forceagainst the lower side of the groove 6. This operation locks the keyinstantly and rigidly with so little lost motion that it is almostimpossible to perceive it, and the greater the force exerted the morerigidly it is held. It also works silently and looks at anypointinstantly.

The disks 4 5 and 15 16 areidentical in their construction, thelever-clutches and their connecting parts being the same, except thatthe faces are in opposite directions and the action of one the reverseof the other, so that while the key of one lever clutch is locked andturning the shaft 2 the other key offers no resistance to the oppositemovement of the opposite grooved disk, and the double lever-clutch thusworks alternately without a perceptible break in the movement whileturning the shaft 2.

In Figs. 7 and 8 I have represented my invention as applied to asewing-machine for the purpose of showing how it may be adapted for thatand other similar uses, and also for the purpose of showing acombination in which the base 3 is not required. By this constructionthe side pieces 28 of a sewing-machine would take the place of the sidepieces 1. (Shown in Figs. 1, 3, 10.) At the top of the rack-frame may beconnected a spiral spring, 29, having its upper end connected to the airder portion of the table 30, for counterbalancing the weight of the rackand connectingrod. By this means (there being no deadcenters to overcomeand the power being always applied at the greatest leverage) theoperator is not required to use either hand to start the machine, thefoot on the treadle 31 being sufficient to start it and stop it (withthe greatest case) at any point required.

I claim as my invention 1. In a device for converting motion, a shaftmounted in hearings in a supporting-frame, two disks, 4 5, rigidlysecured to the shaft and provided with annular grooves, in combinationwith two curved lever-clutches, each having a key, 8, adapted to fit thegrooves and prevent the levers from touching the hubs 10 of the disks,springs for keeping them in po sition, and pins 14, by which they aregiven opposite oscillating movements, whereby a movement in onedirection will cause one key to bind in its groove while the oppositekey is slipping easily in the opposite groove, and a reverse movementwill reverse the action of the clutches, thereby producing a continuousrotary motion of the shaft in one direction, substantially as described.

2. The combination of a shaft mounted in hearings in asupporting-frame,two disks rigidly secured to the shaft and provided with annulargrooves, two curved arms or levers,

each having a key at one end adapted to fit the grooves 011 the disksand hold the arms away from the shaft, and a pin at the opposite ends bywhich they are moved alternately back and forth, a spring on each forkeeping them in position, covering disks having teeth and mounted so asto turn on the shaft, for covering and operating the lever-clutches andtheir grooved disks by means of the pins connecting with them, andtworack-bars connected together and located parallel with and to one sideof each other at opposite sides of the shaft, so that one rack will gearwith each geared coveringdisk, whereby a reciprocating movement of thedouble rack will impart a rotary movement to the shaft, substantially asand for the purposes described.

3. The racks 24 25, secured together and in gear with the gearedcovering'disks, in combi nation with grooved disks rigidly secured backto back to a shaft mounted in asupporting-frame, their curvedlever-clutches provided with keys fitting the groovesin the disks, so asto prevent the curved levers from touching the shaft or hub, springssecured to the curved levers on the opposite side of and touching theshaft or hub, for keeping the levers and keys in their proper position,and pins rigidly secured to the curved levers and passing through holesin the geared covering-disks, for the purposes described.

4, In a device for converting motion, a lever-clutch consisting of thecurved arm 7, a key, 8, spring ll, and pin 14, in combination with agrooved disk mounted upon and rigidly secured to a shaft set in bearingsin a supporting-frame, the key 8 fitting the groove so that the arm 7cannot touch the shaft or hub of the disk, the spring 11 touching theshaft or hub, and thereby keeping the key in its proper position in thegroove, whereby a movement of the pin 14: in a direction tending to drawthe spring against the shaft will cause the key 8 to slip easily in thegroove 6 without moving the disk, and a movement in the oppositedirection will cause the key to bind rigidly in the groove and carry thedisk around with it, substantially as described.

In testimony whereof I hereunto affix my signature in the presence oftwo witnesses.

\VILLIAM H. MGANDBEHVS.

Witnesses:

S. D. L. JACKSON, W. T. GIBsoN.

